Delivery system and method for expandable intracorporeal device

• US 20010047150A1
• Filed: 01/31/2001
• Published: 11/29/2001
• Est. Priority Date: 02/02/2000
• Status: Active Grant

• Current Assignee: Endologix
• Original Assignee: Trivascular Incorporated
• Inventors: Chobotov, Michael V.
• Granted Patent: US 6,602,280 B2
• Time in Patent Office: Days
• US Class Current: 604/107
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

A catheter for delivery of an expandable intracorporeal device and method of using the catheter. The catheter may have an elongate shaft with a proximal section, distal section, proximal end and distal end. The distal section has a radially expandable shear barrier which is at least partially radially constrained by an outer radially constraining section. An expandable intracorporeal device, specifically an expandable endovascular graft, is disposed within an inner space within the radially expandable shear barrier. The catheter is guided to a desired site within a patient'"'"'s body and the radial constraint of the outer radially constraining section is at least partially removed from the radially expandable shear barrier so as to allow the shear barrier and expandable intracorporeal device to expand and deploy. Typically, the radial constraint of the outer radially constraining section is carried out by relative axial movement between the outer radially constraining section and the radially expandable shear barrier.

Claims

1. A catheter for delivery of an expandable intracorporeal device comprising:

an elongate shaft having a proximal section, a distal section, a proximal end and a distal end;

the distal section of the elongate shaft comprising a radially expandable shear barrier disposed about an inner space configured to accept an expandable intracorporeal device in a collapsed state; and

an outer radially constraining section which is disposed about and radially constraining at least a portion of the radially expandable shear barrier and which is capable of axial movement relative to the radially expandable shear barrier.

2. The catheter of

claim 1

wherein the radially expandable shear barrier and the outer radially constraining section are coupled to at least one terminal member disposed at the proximal end of the elongate shaft.

3. The catheter of

claim 2

further comprising an actuator coupled to the at least one terminal member.

4. The catheter of

claim 1

wherein the radially expandable shear barrier has a length of about 1 to about 20 cm.

5. The catheter of

claim 1

wherein the radially expandable shear barrier comprises a slitted inner tubular section and a distal end with at least one longitudinal slit extending proximally therefrom and the inner space comprises an inner lumen disposed within the slitted inner tubular section.

6. The catheter of

claim 5

wherein the outer radially constraining section comprises an outer tubular section which is disposed about and radially constrains at least a portion of the slitted inner tubular section and which is capable of axial movement relative to the slitted inner tubular section.

7. The catheter of

claim 6

wherein the slitted inner tubular section and the outer tubular section are coupled to at least one terminal member disposed at the proximal end of the elongate shaft.

8. The catheter of

claim 7

wherein the slitted inner tubular section is coupled to a first terminal member comprising a proximal handle disposed at the proximal end of the elongate shaft. and the outer tubular section is coupled to a second terminal member comprising a distal handle disposed at the proximal end of the elongate shaft.

9. The catheter of

claim 6

further comprising a guidewire tube disposed within the inner lumen of the slitted inner tubular section and having an inner guidewire lumen, a proximal end, a distal end and a distal section.

10. The catheter of

claim 9

further comprising a nose piece disposed about and secured to the distal section of the guidewire tube.

11. The catheter of

claim 6

wherein the longitudinal slits of the slitted inner tubular section have a length of about 1 to about 20 cm.

12. The catheter of

claim 6

further comprising an expandable intracorporeal device disposed within the inner lumen of the slitted inner tubular section and wherein the catheter and expandable intracorporeal device comprise a catheter system.

13. The catheter system of

claim 12

wherein the elongate shaft has a length of about 10 to about 200 cm.

14. The catheter system of

claim 12

wherein the elongate shaft has a length of about 10 to about 150 cm and is configured for percutaneous delivery from outside a patient to a desired site within a patient'"'"'s body through an intracorporeal conduit of the patient.

15. The catheter of

claim 1

wherein the distal section of the elongate shaft has a maximum outside transverse dimension of about 2.5 to about 3.5 mm.

16. The catheter of

claim 1

wherein the distal section of the elongate shaft has a maximum outside transverse dimension of about 2.5 to about 6 mm.

17. The catheter of

claim 10

wherein the nose piece has a distal end with a contoured distally tapered bullet shape and a proximal end which is configured to engage the inner lumen of the outer tubular section.

18. The catheter system of

claim 12

wherein the expandable intracorporeal device comprises an expandable endovascular device.

19. The catheter system of

claim 18

wherein the expandable endovascular device comprises an expandable endovascular graft.

20. A method for deploying an expandable intracorporeal device within a patient'"'"'s body comprising:

a) providing a catheter system including;

an elongate shaft having a proximal section, a distal section, a proximal end and a distal end,

the distal section of the elongate shaft comprising a radially expandable shear barrier disposed about an inner space configured to accept the expandable intracorporeal device in a collapsed state,

an outer radially constraining section which is disposed about and radially constrains at least a portion of the radially expandable shear barrier, and

an expandable intracorporeal device disposed within the inner space of the radially expandable shear barrier;

b) introducing the distal end of the catheter system into the patient'"'"'s body;

c) advancing the catheter system to a desired site within the patient'"'"'s body; and

d) initiating relative axial movement between the radially expandable shear barrier and the outer constraining section to at least partially remove the radial constraint on the radially expandable shear barrier sufficiently for the expandable intracorporeal device to expand and deploy at the desired site.

21. The method of

claim 20

wherein the expandable intracorporeal device disposed within the inner space of the radially expandable shear barrier comprises an expandable endovascular device.

22. The method of

claim 21

wherein the expandable endovascular device disposed within the inner space of the radially expandable shear barrier comprises an expandable endovascular graft.

23. The method of

claim 20

wherein the radially expandable shear barrier comprises a slitted tubular section and the outer radially constraining section comprises an outer tubular section.

24. The method of

claim 23

wherein the relative axial movement between the slitted inner tubular section and the outer tubular section comprises axially withdrawing the outer tubular section from the slitted tubular section in a proximal direction.

25. The method of

claim 23

wherein the expandable intracorporeal device comprises an expandable endovascular graft having an expandable anchor portion disposed within an inner lumen of the outer tubular section distal of a distal end of the slitted inner tubular section prior to initiation of relative axial movement between the slitted inner tubular section and the outer tubular section.

26. The method of

claim 20

wherein a maximum outside transverse dimension of the distal section of the elongate shaft is about 2.5 to about 6 mm prior to initiation of relative axial movement between the radially expandable shear barrier and the outer constraining section.

27. The method of

claim 20

wherein a maximum outside transverse dimension of the distal section of the elongate shaft is about 2.5 to about 3.5 mm prior to initiation of relative axial movement between the radially expandable shear barrier and the outer constraining section.

28. A catheter system comprising:

an elongate shaft having a proximal section, a distal section, a proximal end and a distal end;

the distal section of the elongate shaft comprising a radially expandable shear barrier disposed about an inner space configured to accept an expandable intracorporeal device in a collapsed state;

an outer radially constraining section which is disposed about and radially constraining at least a portion of the radially expandable shear barrier and which is capable of axial movement relative to the radially expandable shear barrier; and

an expandable intracorporeal device disposed within the inner lumen of the slitted inner tubular section and wherein the catheter and expandable intracorporeal device comprise a catheter system.

29. The catheter system of

claim 28

wherein the radially expandable shear barrier comprises a slitted inner tubular section and a distal end with at least one longitudinal slit extending proximally therefrom and the inner space comprises an inner lumen disposed within the slitted inner tubular section.

30. The catheter system of

claim 29

wherein the outer radially constraining section comprises an outer tubular section which is disposed about and radially constrains at least a portion of the slitted inner tubular section and which is capable of axial movement relative to the slitted inner tubular section.